Question | Answer |
the ancient Greeks knew of all of the following planets EXCEPT | Uranus |
the sun produces energy by | nuclear fusion |
what layer are you looking at an image of the sun | photosphere |
the solar wind is a stream of electrically charged particles that extend outward from the sun's | corona |
In a heliocentric system, Earth revolves around | the sun |
what do all of the inner planets have in common | they all are small and have rocky surfaces |
aside from Earth, which inner planet once had liquid water on its surface | mars |
the atmosphere of the gas giant cannot escape into space because | the planets have very strong gravitational pulls |
what do the first four inner planets have in common | they are about the same size as Earth and are made mainly of iron |
astronomers predicted the existence and orbit of Neptune based on | Neptune's gravitational effect on the orbit of Uranus |
the fact each planet's orbit is an ellipse was discovered by | Kepler |
what shape are the orbits of most comets | long, narrow ellipses |
meteoroids usually come from | comets or asteroids |
when a meteoroid enters earth's atmosphere, it produces a streak of light called a(n) | meteor |
scientists have discovered that life forms on earth exist | in a very wide range of condition |
which of the inner planets does NOT show evidence of volcanic activity | Mercury |
Saturn's rings are made up of mostly of | chunks of ice and rock |
Uranus is different from most other planets because it | rotates on its side |
Neptune is very similar in size and color to | Uranus |
which is the smallest terrestrial planet | Mercury |
true or false
earth is thought to be at the center of the solar system in the g-e-o-c-e-n-t-r-i-c | true |
true or false
all of the t-e-r-r-e-s-t-r-I-a-l planets have many moons | false/ gas giants |
true or false
the sun's surface layer is the p-h-o-t-o-s-p-h-e-r-e | true |
true or false
the number of sunspots on the sun varies over a period of about 1-1- y-e-a-r-s | true |
true or false
the first four i-n-n-e-r planets are gas giants | false/ outer |
true or false
the g-a-s g-i-a-n-t-s are small, dense, and have rocky surfaces. | false/ terrestrial |
true or false
the Great Red Spot is a huge storm on S-a-t-u-r-n | false/ Jupiter |
true or false
most comets are found in either the Oort cloud or the a-s-t-e-r-o-i-d b-e-l-t | false/ Kuiper belt |
true or false
a comet or asteroid can break up to form a chunk of rock called a meteroid | true |
the planets that are closer to the sun than Earth are Venus and ________ | Mercury |
a meteoroid that hits earth's surface is called a(n) _______ | meteor |
_________ discovered Jupiter's four largest moons | Galileo |
energy is transferred from the sun's core toward the convection zone mainly in the form of _____________ | I don't know |
the sun's ________,which looks like a halo, can usually be seen during a solar eclipse regions of a surface | corona |
regions on the surface of mars have patterns that appear to have been made by __________ | volcanoes |
the __________ consists of the sun, nine planets and their moons, and several kinds of smaller objects | solar system |
mar's atmosphere is mostly _____________ | carbon dioxide |
Jupiter's Great Red Spot is a(n)_________ larger than Earth | storm |
_____________ is the only planet that has a lower density than water | Saturn |